| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:14.94 | 2025 Central Region Div 2 LC Championships | 2025-06-13 |
| 100m Backstroke | 1:09.15 | 2026 Trojan Pentathlon | 2026-03-06 |
| 100m Breaststroke | 1:22.63 | 2026 Trojan Pentathlon | 2026-03-06 |
| 100m Butterfly | 1:09.59 | Scar Pan Am Winter Classic | 2026-01-16 |
| 100m Butterfly | 1:08.89 | 2026 Trojan Pentathlon | 2026-03-06 |
| 100m Freestyle | 1:00.29 | Scar Pan Am Winter Classic | 2026-01-16 |
| 100m Freestyle | 58.15 | 2026 Trojan Pentathlon | 2026-03-06 |
| 100m IM | 1:10.05 | 2026 Trojan Pentathlon | 2026-03-06 |
| 200m Backstroke | 2:31.29 | 2025 NYAC Cup | 2025-11-14 |
| 200m Freestyle | 2:13.12 | Scar Pan Am Winter Classic | 2026-01-16 |
| 200m Freestyle | 2:06.91 | David Lawson Invitational 2026 | 2026-01-23 |
| 200m IM | 2:32.47 | Scar Pan Am Winter Classic | 2026-01-16 |
| 200m IM | 2:32.20 | 2026 Trojan Pentathlon | 2026-03-06 |
| 400m Freestyle | 4:41.26 | Scar Pan Am Winter Classic | 2026-01-16 |
| 400m Freestyle | 4:33.02 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 50m Backstroke | 35.13 | MAC Rising Star #2 | 2025-05-30 |
| 50m Backstroke | 31.66 | 2026 Trojan Pentathlon | 2026-03-06 |
| 50m Breaststroke | 39.70 | MAC Rising Star #2 | 2025-05-30 |
| 50m Breaststroke | 37.61 | 2026 Trojan Pentathlon | 2026-03-06 |
| 50m Butterfly | 30.81 | Scar Pan Am Winter Classic | 2026-01-16 |
| 50m Butterfly | 30.36 | 2026 Trojan Pentathlon | 2026-03-06 |
| 50m Freestyle | 27.97 | Scar Pan Am Winter Classic | 2026-01-16 |
| 50m Freestyle | 26.77 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
Chown, Ian's top personal bests include 100m Backstroke (1:14.94), 100m Backstroke (1:09.15), 100m Breaststroke (1:22.63), 100m Butterfly (1:09.59), 100m Butterfly (1:08.89).
Chown, Ian swims for Oakville Aquatic Club.
Chown, Ian has competed in 10 meets.